“Internal politics” is becoming the BBC’s kryptonite. Bad management was responsible for the departure of Simon Mayo, who resigned from his once hugely popular Radio 2 drive-time show after being forced into a loveless match with Jo Whiley. Mayo announced on Monday that he is joining a brand new classical radio station, Scala, which is to be launched in March by Bauer. Mark Kermode, with whom Mayo still presents Radio 5 Live’s film programme, will also get a slot on Scala.